Steam-generator



(No Model.)

H. H. WARD.

STEAM GENERATOR.

Patente-d Mar. 8

N PETERS. Pham-mhogmpmr. wuhingvnn. D. C.

steam-generating apparatus vhaving largelyf vides an inclosingbottoln for the compartment.

UNITED STATES PATENT OFFICE.

HENRY ll. VARD, OF BATAVIA, ILLNOIS.

STEAM-GENERATO R.

SPECIFICATION forming part of Letters Patent No.`359,193, dated ldarch 8, 1887,

Application filed Juno 8. 1886.

To all whom it may concern:

Be it known that l, HENRY H. NVARD, of Batavia, county7 of Kane, and State of Illinois, have invented certain new and useful-Improvements in Stcam-Generators, of which the following is afull, clear, and exact description, that will enable others to make and use the same, reference being to the accompanying drawings, forming a part of this specilication.

The object of this invention is to provide a increased heating-surfaces in order to utilize all or nearly all of the products of combustion.

The nature of the invention consists in constructing a generator o tubes or pipes so arranged as to present a large heatingsurface to the action of the iiames, and combining therewith the qualities and advantages of a quick steam-raising apparatus, all as will be hereinafter set forth, and pointed out in the claims.

Figure l is a front elevation and partial sec tion of asteam-generating apparatus embodying my improved features; and Fig. 2, a vertical longitudinal section in the angular plane 2 2, Fig. l, looking inthe direction indicated by the arrows.

In the drawings, A represents a metallic jacket inclosing the apparatus; A, a hollow supporting-base containing the ash-pit A2; A3, the line of the grate-bars; A, the combustionchamber, and A5 the smoke-escape pipe.

The double or hollow back tube-plate B is provided with the water and steam spaces a, (see Fig. 2,) which communicate with each other. This tube and liuc-plate is supported on the horizontal angle-plate e', which in turn rests upon the base A. The plate a also proa2, formed by leaving the space (shown in Fig. 2) between the rear side of the back-plate B and the walls of the inclosing-jacket. The back ends of the larger water-tubes, C, abut against the front side of the tube-plate B. Some ofthe tubes C are supported in position and clamped endwise by means of the dues a3 and the clamping-nuts a, while the rest of the large tubes and the small tubes a5 are secured in place by means of the clamping-rods a". The flues a3 are arranged on the inside of the water-tubes, and are of a less diameter, so as to provide the annular Iwaterspace between Serial No. 204,447. (No model.)

the, tubes and lilies, as shown in Fig. 2. The back ends of the flues pass through to and are screwed into the back part of the plate B, while the front projecting ends are provided with the screw-threaded clamping-nuts a, by which means these parts are drawn close together to form tight joints. The tubes and liues are secured at the back ends only, the front ends being left free.

The series of tubes C are arranged to have vContact with and rest against each other their entire length, so as to form flue-passages for the heat coming through the openings in the double liuc-plate B, as shown in Fig. l. By nest-ing the tubes C togetherV in "this manner every four tubes form an additional liuc-passage, thus greatly increasing the heating-surface.

The two sides of the fire-box are lined with the series ot' horizontal tubes @which rest upon each other and extend clear to the top of the generator, as shown in Fig. l. rlhese series of tubes lining the two sides are of a greater length than the tubes C, (see Fig. 2,) and extend from the back plate, B, clear to the front. A space or compartment, I), is provided at the front of the apparatus which communicates with the smoke-pipe. By this arrangement the heating-surface and generating capacity of the apparatus are greatly increased.

A number of water-circulating pipes, D, are arranged vertically in the compartment a2 back of the tube-plate B. The lower ends of these pipes communicate with the waterfspacc of the tube-plate B at a point back of the lirelooX, the upper ends being inserted just below the water-line, as shown in Fig. 2. This arrangement of water circulating pipes also greatly increases the heating-surface and utilizes heat that would be otherwise lost.

The portion of the tube-plate forming the back part of the tire-box is provided with the elongated opening (1,(see Fig.1,)through which the products of combustion escape, the heat striking the pipes D and then passing through the dues er* and the passages fr to the 'front on the way to the smoke-pipe.

D is the feed-water pipe, and Dtthe safetyvalve connection.

'This for-m of construction and arrangement provides a very compact apparatus, and pre- ICO ' sents so great an amount of heatingsurface as to utilize all or nearly all of the'heat from the fuel expended.

The structure shown forms a portable apparatus; but a stationary generator niay be provided by substituting brick walls for the inelosing-jaoket shown.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In asteain-gen erating apparatus,tl1e cornbination, with a back or tube plate, B, having a Water-compartment and provided with the openings x, of a series of tubes, a number of fines arranged on the inside of said tubes, and the means for securing said parts in properrelation to eaoh other,substantially as described/ 2. In a stean1-generating apparatus, the series of tubes C, which have Contact with and rest against each other to form additional fluepassages, in Combination with the flue-plate B, provided with. the openings x, which open into the passages formed by the nesting` of said tubes, substantially as set forth.

3. In a steam-generating apparatus,the combination, with the double back-plate having a Water-compartment, of a series of horizontal Watertubes resting one upon the other and inelosing two sides of the {ire-box, the back ends of said tubes having a circulating-connection with the front side of said back-plate, While the front ends are free, substantially as described.

4. In atubular steam-generating apparatus, the combination, with va double baekplate supporting the tubular structure and provided with the elongated opening d, of the series of vertical Water-pipes D, having both ends inserted in the rear side of said baolcplate and communicating With the Water-oo1npartment therein, si'ibstantially as and i'or the purpose set forth.

1 Hann-Y H. WARD.

XVitiiesses:

L. M. FREEMAN, L. B. CoUPLANn. 

